我无法在C＃中使用lambda表达式调用事件处理程序 [英] I am not able to invoke an event handler using a lambda expression in C#

问题描述

将此dll用于WMPlayer。

Using this dll for WMPlayer.

using AxWMPLib;
using WMPLib;

public static AxWMPLib.AxWindowsMediaPlayer wplayer = new AxWMPLib.AxWindowsMediaPlayer();
public static WMPLib.WindowsMediaPlayer wplayer_1 = new WMPLib.WindowsMediaPlayer();

尝试访问此方法，该方法正常...

Try to access this method, which is working...

//state changed event handler
wplayer_1.PlayStateChange += new WMPLib._WMPOCXEvents_PlayStateChangeEventHandler((NewState) => wplayer_playstate_change(NewState, media, playlist));

我正在更改播放器DLL，在此代码中，它给我一个调用错误。

I am changing the player DLL and in this code it gives me an error for invoke.

wplayer.PlayStateChange += new AxWMPLib._WMPOCXEvents_PlayStateChangeEventHandler((NewState) =>  wplayer_playstate_change(NewState,media,playlist));

这是我想要的方法调用：

This is a method which I want to invoke:

private void wplayer_playstate_change(int NewState, OmnisignMedia media, IEnumerable<OmnisignMedia> partialList)
{
}

在这种情况下你可以帮助。

推荐答案

Are you aware that the delegate for AxWMPLib (Activex Control Wrapper)

player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e). So you might have to rewrite your code accordingly.

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